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- W1653049968 abstract "Measurements of electroweak boson production in pp collisions at $sqrt{s} = 7$ TeV are presented using the decays $W rightarrow munu$, $Z rightarrow mumu$ and $Z rightarrow tautau$ recorded using the LHCb detector at the LHC. For muonic $W$ and $Z$ decays, the data sample corresponds to an integrated luminosity of 37.1 $pm$ 1.3 pb$^{-1}$. Here the $W$ and $Z$ bosons are reconstructed from muons with transverse momenta, $p_{T}$, above 20 GeV and pseudorapidity, $eta$, between 2 and 4.5, and, in the case of the $Z$, a dimuon invariant mass $M_{Z}$ between 60 GeV and 120 GeV. For $Z$ decays to tau lepton final states, 247 pb$^{-1}$ of data has been used. Here one tau is identified through its decay to a muon and neutrinos; the other through its decay to an electron or muon and neutrinos. The cross-sections are measured to be: $sigma(W^{+}rightarrowmu^{+}nu) = $ 808 $pm$ 7 $pm$ 28 $pm$ 28 pb; $sigma(W^{+}rightarrowmu^{+}nu) = $ 634 $pm$ 7 $pm$ 21 $pm$ 22 pb; $sigma(Zrightarrowmumu) = $ 74.9 $pm$ 1.6 $pm$ 3.8 $pm$ 2.6 pb; $sigma(Zrightarrowtautau) = $ 82 $pm$ 8 $pm$ 7 $pm$ 4 pb. Here the first error is statistical, the second is systematic and the third is due to the luminosity determination. For muonic final states, differential measurements, cross-section ratios and the $W$ charge asymmetry are also measured in the same kinematic region. The ratio of the $Zrightarrowtautau$ and $Zrightarrowmumu$ cross-sections has been measured to be 1.09 $pm$ 0.17, consistent with lepton universality. Theoretical predictions, calculated at next-to-next-to-leading order (NNLO) in QCD using recent parton distribution functions, are found to be in agreement with the measurements." @default.
- W1653049968 created "2016-06-24" @default.
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- W1653049968 date "2011-09-15" @default.
- W1653049968 modified "2023-09-25" @default.
- W1653049968 title "W and Z production in the forward region at LHCb" @default.
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